... , length:300-1250mm 2.Carbon layer thick: 35mm,50mm High Effective Air Purifier / Air Cleaner Cartridge Filtermatch *Carbon layer thickness ... through the system. And Housing Material is Galvanised steel & high impact polycarbonate cap. 3. ApplicationIt is used everywhere , ... , Heavy duty hanger, Flexible duct... Rope Ratchet FilterHanger High Effective Air Purifier / Air Cleaner Cartridge Filter